iExport files from remote server, Fixes: gui/#2271

gns3server/compute/base_manager.py

@@ -538,7 +538,7 @@ class BaseManager:
         path = os.path.abspath(os.path.join(directory, *os.path.split(filename)))
         if os.path.commonprefix([directory, path]) != directory:
             raise aiohttp.web.HTTPForbidden(text="Could not write image: {}, {} is forbiden".format(filename, path))
-        log.info("Writting image file %s", path)
+        log.info("Writing image file %s", path)
         try:
             remove_checksum(path)
             # We store the file under his final name only when the upload is finished

gns3server/controller/compute.py

@@ -320,6 +320,22 @@ class Compute:
             raise aiohttp.web.HTTPNotFound(text="{} not found on compute".format(path))
         return response
 
+    @asyncio.coroutine
+    def download_image(self, image_type, image):
+        """
+        Read file of a project and download it
+
+        :param image_type: Image type
+        :param image: The path of the image
+        :returns: A file stream
+        """
+
+        url = self._getUrl("/{}/images/{}".format(image_type, image))
+        response = yield from self._session().request("GET", url, auth=self._auth)
+        if response.status == 404:
+            raise aiohttp.web.HTTPNotFound(text="{} not found on compute".format(image))
+        return response
+
     @asyncio.coroutine
     def stream_file(self, project, path):
         """

gns3server/controller/export_project.py

@@ -58,7 +58,8 @@ def export_project(project, temporary_dir, include_images=False, keep_compute_id
     # First we process the .gns3 in order to be sure we don't have an error
     for file in os.listdir(project._path):
         if file.endswith(".gns3"):
-            _export_project_file(project, os.path.join(project._path, file), z, include_images, keep_compute_id, allow_all_nodes)
+            images = yield from _export_project_file(project, os.path.join(project._path, file),
+                                          z, include_images, keep_compute_id, allow_all_nodes, temporary_dir)
 
     for root, dirs, files in os.walk(project._path, topdown=True):
         files = [f for f in files if not _filter_files(os.path.join(root, f))]
@@ -78,6 +79,8 @@ def export_project(project, temporary_dir, include_images=False, keep_compute_id
             else:
                 z.write(path, os.path.relpath(path, project._path), compress_type=zipfile.ZIP_DEFLATED)
 
+    downloaded_files = set()
+
     for compute in project.computes:
         if compute.id != "local":
             compute_files = yield from compute.list_files(project)
@@ -94,6 +97,8 @@ def export_project(project, temporary_dir, include_images=False, keep_compute_id
                     response.close()
                     f.close()
                     z.write(temp_path, arcname=compute_file["path"], compress_type=zipfile.ZIP_DEFLATED)
+                    downloaded_files.add(compute_file['path'])
+
     return z
 
 
@@ -121,7 +126,8 @@ def _filter_files(path):
     return False
 
 
-def _export_project_file(project, path, z, include_images, keep_compute_id, allow_all_nodes):
+@asyncio.coroutine
+def _export_project_file(project, path, z, include_images, keep_compute_id, allow_all_nodes, temporary_dir):
     """
     Take a project file (.gns3) and patch it for the export
 
@@ -131,7 +137,7 @@ def _export_project_file(project, path, z, include_images, keep_compute_id, allo
     """
 
     # Image file that we need to include in the exported archive
-    images = set()
+    images = []
 
     with open(path) as f:
         topology = json.load(f)
@@ -139,6 +145,8 @@ def _export_project_file(project, path, z, include_images, keep_compute_id, allo
     if "topology" in topology:
         if "nodes" in topology["topology"]:
             for node in topology["topology"]["nodes"]:
+                compute_id = node.get('compute_id', 'local')
+
                 if node["node_type"] == "virtualbox" and node.get("properties", {}).get("linked_clone"):
                     raise aiohttp.web.HTTPConflict(text="Topology with a linked {} clone could not be exported. Use qemu instead.".format(node["node_type"]))
                 if not allow_all_nodes and node["node_type"] in ["virtualbox", "vmware", "cloud"]:
@@ -149,22 +157,42 @@ def _export_project_file(project, path, z, include_images, keep_compute_id, allo
 
                 if "properties" in node and node["node_type"] != "docker":
                     for prop, value in node["properties"].items():
-                        if prop.endswith("image"):
-                            if not keep_compute_id:  # If we keep the original compute we can keep the image path
-                                node["properties"][prop] = os.path.basename(value)
-                            if include_images is True:
-                                images.add(value)
+                        if not prop.endswith("image"):
+                            continue
+
+                        if value is None or value.strip() == '':
+                            continue
+
+                        if not keep_compute_id:  # If we keep the original compute we can keep the image path
+                            node["properties"][prop] = os.path.basename(value)
+
+                        if include_images is True:
+                            images.append({
+                                'compute_id': compute_id,
+                                'image': value,
+                                'image_type': node['node_type']
+                            })
 
         if not keep_compute_id:
-            topology["topology"]["computes"] = []  # Strip compute informations because could contain secret info like password
+            topology["topology"]["computes"] = []  # Strip compute information because could contain secret info like password
+
+    local_images = set([i['image'] for i in images if i['compute_id'] == 'local'])
+
+    for image in local_images:
+        _export_local_images(project, image, z)
+
+    remote_images = set([
+        (i['compute_id'], i['image_type'], i['image'])
+        for i in images if i['compute_id'] != 'local'])
 
-    for image in images:
-        _export_images(project, image, z)
+    for compute_id, image_type, image in remote_images:
+        yield from _export_remote_images(project, compute_id, image_type, image, z, temporary_dir)
 
     z.writestr("project.gns3", json.dumps(topology).encode())
 
+    return images
 
-def _export_images(project, image, z):
+def _export_local_images(project, image, z):
     """
     Take a project file (.gns3) and export images to the zip
 
@@ -191,4 +219,45 @@ def _export_images(project, image, z):
             arcname = os.path.join("images", directory, os.path.basename(image))
             z.write(path, arcname)
             return
-    raise aiohttp.web.HTTPConflict(text="Topology could not be exported because the image {} is not available. If you use multiple server, we need a copy of the image on the main server.".format(image))
+
+
+@asyncio.coroutine
+def _export_remote_images(project, compute_id, image_type, image, project_zipfile, temporary_dir):
+    """
+    Export specific image from remote compute
+    :param project:
+    :param compute_id:
+    :param image_type:
+    :param image:
+    :param project_zipfile:
+    :return:
+    """
+
+    log.info("Obtaining image `{}` from `{}`".format(image, compute_id))
+
+    try:
+        compute = [compute for compute in project.computes if compute.id == compute_id][0]
+    except IndexError:
+        raise aiohttp.web.HTTPConflict(
+            text="Cannot export image from `{}` compute. Compute doesn't exist.".format(compute_id))
+
+    (fd, temp_path) = tempfile.mkstemp(dir=temporary_dir)
+    f = open(fd, "wb", closefd=True)
+    response = yield from compute.download_image(image_type, image)
+
+    if response.status != 200:
+        raise aiohttp.web.HTTPConflict(
+            text="Cannot export image from `{}` compute. Compute sent `{}` status.".format(
+                compute_id, response.status))
+
+    while True:
+        data = yield from response.content.read(512)
+        if not data:
+            break
+        f.write(data)
+    response.close()
+    f.close()
+    arcname = os.path.join("images", image_type, image)
+    log.info("Saved {}".format(arcname))
+    project_zipfile.write(temp_path, arcname=arcname, compress_type=zipfile.ZIP_DEFLATED)
+

gns3server/handlers/api/compute/dynamips_vm_handler.py

@@ -448,6 +448,28 @@ class DynamipsVMHandler:
         yield from dynamips_manager.write_image(request.match_info["filename"], request.content)
         response.set_status(204)
 
+    @Route.get(
+        r"/dynamips/images/{filename:.+}",
+        parameters={
+            "filename": "Image filename"
+        },
+        status_codes={
+            200: "Image returned",
+        },
+        raw=True,
+        description="Download a Dynamips IOS image")
+    def download_image(request, response):
+        filename = request.match_info["filename"]
+
+        dynamips_manager = Dynamips.instance()
+        image_path = dynamips_manager.get_abs_image_path(filename)
+
+        # Raise error if user try to escape
+        if filename[0] == ".":
+            raise aiohttp.web.HTTPForbidden
+
+        yield from response.file(image_path)
+
     @Route.post(
         r"/projects/{project_id}/dynamips/nodes/{node_id}/duplicate",
         parameters={
@@ -467,3 +489,4 @@ class DynamipsVMHandler:
         )
         response.set_status(201)
         response.json(new_node)
+

gns3server/handlers/api/compute/iou_handler.py

@@ -16,7 +16,8 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import os
-from aiohttp.web import HTTPConflict
+
+import aiohttp.web
 
 from gns3server.web.route import Route
 from gns3server.schemas.nio import NIO_SCHEMA
@@ -239,7 +240,7 @@ class IOUHandler:
         vm = iou_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
         nio_type = request.json["type"]
         if nio_type not in ("nio_udp", "nio_tap", "nio_ethernet", "nio_generic_ethernet"):
-            raise HTTPConflict(text="NIO of type {} is not supported".format(nio_type))
+            raise aiohttp.web.HTTPConflict(text="NIO of type {} is not supported".format(nio_type))
         nio = iou_manager.create_nio(request.json)
         yield from vm.adapter_add_nio_binding(int(request.match_info["adapter_number"]), int(request.match_info["port_number"]), nio)
         response.set_status(201)
@@ -378,3 +379,26 @@ class IOUHandler:
         iou_manager = IOU.instance()
         yield from iou_manager.write_image(request.match_info["filename"], request.content)
         response.set_status(204)
+
+
+    @Route.get(
+        r"/iou/images/{filename:.+}",
+        parameters={
+            "filename": "Image filename"
+        },
+        status_codes={
+            200: "Image returned",
+        },
+        raw=True,
+        description="Download an IOU image")
+    def download_image(request, response):
+        filename = request.match_info["filename"]
+
+        iou_manager = IOU.instance()
+        image_path = iou_manager.get_abs_image_path(filename)
+
+        # Raise error if user try to escape
+        if filename[0] == ".":
+            raise aiohttp.web.HTTPForbidden
+
+        yield from response.file(image_path)

gns3server/handlers/api/compute/qemu_handler.py

@@ -18,7 +18,7 @@
 import sys
 import os.path
 
-from aiohttp.web import HTTPConflict
+import aiohttp.web
 
 from gns3server.web.route import Route
 from gns3server.compute.project_manager import ProjectManager
@@ -183,7 +183,7 @@ class QEMUHandler:
         if sys.platform.startswith("linux") and qemu_manager.config.get_section_config("Qemu").getboolean("enable_kvm", True) and "-no-kvm" not in vm.options:
             pm = ProjectManager.instance()
             if pm.check_hardware_virtualization(vm) is False:
-                raise HTTPConflict(text="Cannot start VM with KVM enabled because hardware virtualization (VT-x/AMD-V) is already used by another software like VMware or VirtualBox")
+                raise aiohttp.web.HTTPConflict(text="Cannot start VM with KVM enabled because hardware virtualization (VT-x/AMD-V) is already used by another software like VMware or VirtualBox")
         yield from vm.start()
         response.json(vm)
 
@@ -285,7 +285,7 @@ class QEMUHandler:
         vm = qemu_manager.get_node(request.match_info["node_id"], project_id=request.match_info["project_id"])
         nio_type = request.json["type"]
         if nio_type not in ("nio_udp", "nio_tap", "nio_nat"):
-            raise HTTPConflict(text="NIO of type {} is not supported".format(nio_type))
+            raise aiohttp.web.HTTPConflict(text="NIO of type {} is not supported".format(nio_type))
         nio = qemu_manager.create_nio(request.json)
         yield from vm.adapter_add_nio_binding(int(request.match_info["adapter_number"]), nio)
         response.set_status(201)
@@ -479,3 +479,25 @@ class QEMUHandler:
         qemu_manager = Qemu.instance()
         yield from qemu_manager.write_image(request.match_info["filename"], request.content)
         response.set_status(204)
+
+    @Route.get(
+        r"/qemu/images/{filename:.+}",
+        parameters={
+            "filename": "Image filename"
+        },
+        status_codes={
+            200: "Image returned",
+        },
+        raw=True,
+        description="Download Qemu image")
+    def download_image(request, response):
+        filename = request.match_info["filename"]
+
+        iou_manager = Qemu.instance()
+        image_path = iou_manager.get_abs_image_path(filename)
+
+        # Raise error if user try to escape
+        if filename[0] == ".":
+            raise aiohttp.web.HTTPForbidden
+
+        yield from response.file(image_path)

gns3server/web/response.py

@@ -113,7 +113,7 @@ class Response(aiohttp.web.Response):
         self.body = json.dumps(answer, indent=4, sort_keys=True).encode('utf-8')
 
     @asyncio.coroutine
-    def file(self, path):
+    def file(self, path, status=200, set_content_length=True):
         """
         Return a file as a response
         """
@@ -124,27 +124,34 @@ class Response(aiohttp.web.Response):
             self.headers[aiohttp.hdrs.CONTENT_ENCODING] = encoding
         self.content_type = ct
 
-        st = os.stat(path)
-        self.last_modified = st.st_mtime
-        self.headers[aiohttp.hdrs.CONTENT_LENGTH] = str(st.st_size)
+        if set_content_length:
+            st = os.stat(path)
+            self.last_modified = st.st_mtime
+            self.headers[aiohttp.hdrs.CONTENT_LENGTH] = str(st.st_size)
+        else:
+            self.enable_chunked_encoding()
 
-        with open(path, 'rb') as fobj:
-            yield from self.prepare(self._request)
-            chunk_size = 4096
-            chunk = fobj.read(chunk_size)
-            while chunk:
-                self.write(chunk)
-                yield from self.drain()
-                chunk = fobj.read(chunk_size)
+        self.set_status(status)
 
-            if chunk:
-                self.write(chunk[:count])
-                yield from self.drain()
+        try:
+            with open(path, 'rb') as fobj:
+                yield from self.prepare(self._request)
+
+                while True:
+                    data = fobj.read(4096)
+                    if not data:
+                        break
+                    yield from self.write(data)
+                    yield from self.drain()
+
+        except FileNotFoundError:
+            raise aiohttp.web.HTTPNotFound()
+        except PermissionError:
+            raise aiohttp.web.HTTPForbidden()
 
     def redirect(self, url):
         """
         Redirect to url
-
         :params url: Redirection URL
         """
         raise aiohttp.web.HTTPFound(url)

tests/controller/test_export_project.py

@@ -351,3 +351,69 @@ def test_export_keep_compute_id(tmpdir, project, async_run):
             topo = json.loads(myfile.read().decode())["topology"]
             assert topo["nodes"][0]["compute_id"] == "6b7149c8-7d6e-4ca0-ab6b-daa8ab567be0"
             assert len(topo["computes"]) == 1
+
+def test_export_images_from_vm(tmpdir, project, async_run, controller):
+    """
+    If data is on a remote server export it locally before
+    sending it in the archive.
+    """
+
+    compute = MagicMock()
+    compute.id = "vm"
+    compute.list_files = AsyncioMagicMock(return_value=[
+        {"path": "vm-1/dynamips/test"}
+    ])
+
+    # Fake file that will be download from the vm
+    mock_response = AsyncioMagicMock()
+    mock_response.content = AsyncioBytesIO()
+    async_run(mock_response.content.write(b"HELLO"))
+    mock_response.content.seek(0)
+    mock_response.status = 200
+    compute.download_file = AsyncioMagicMock(return_value=mock_response)
+
+    mock_response = AsyncioMagicMock()
+    mock_response.content = AsyncioBytesIO()
+    async_run(mock_response.content.write(b"IMAGE"))
+    mock_response.content.seek(0)
+    mock_response.status = 200
+    compute.download_image = AsyncioMagicMock(return_value=mock_response)
+
+    project._project_created_on_compute.add(compute)
+
+    path = project.path
+    os.makedirs(os.path.join(path, "vm-1", "dynamips"))
+
+    topology = {
+        "topology": {
+            "nodes": [
+                    {
+                        "compute_id": "vm",
+                        "properties": {
+                            "image": "test.image"
+                        },
+                        "node_type": "dynamips"
+                    }
+            ]
+        }
+    }
+
+    # The .gns3 should be renamed project.gns3 in order to simplify import
+    with open(os.path.join(path, "test.gns3"), 'w+') as f:
+        f.write(json.dumps(topology))
+
+    z = async_run(export_project(project, str(tmpdir), include_images=True))
+    assert compute.list_files.called
+
+    with open(str(tmpdir / 'zipfile.zip'), 'wb') as f:
+        for data in z:
+            f.write(data)
+
+    with zipfile.ZipFile(str(tmpdir / 'zipfile.zip')) as myzip:
+        with myzip.open("vm-1/dynamips/test") as myfile:
+            content = myfile.read()
+            assert content == b"HELLO"
+
+        with myzip.open("images/dynamips/test.image") as myfile:
+            content = myfile.read()
+            assert content == b"IMAGE"